#header {
  width: 100px;
  height: 200px;
  background: #1b6d85;
}
.box {
  background-color: yellow;
}
.box .content {
  color: red;
}
.box p a {
  color: blue;
}
.box p a:hover {
  text-decoration: none;
  color: #ff0000;
}
.box:hover .content {
  color: blue;
}
